Clay-molding die



Now-1s, 1930. A. P. KELLER 1,782,236

I CLAY HOLDING DIEV Filed July 25, 1929 UNITED .#fmtrEs.l

`Arnnanw P. KELLER',Q0FTII FFIN oHIo -oLAY-MOLDrNG. mn y l .Application aiedfbreiy a5,

undercut, no means hasheretofore existed in 1 the art, so far as Iam aware, whereby the dief` plate couldfbe properly drawn from such an..

undercut design. It has therefore beenin'ec-y essary, at least partly, to executeVA the de# sign by hand work afterthe .piece is molded.

My invention solves thisl .problem in a Vsimple and effective manner, and providesa die in which workof this charactercan. be quick.- ly and cheaply produced.v p

Of the accompanying drawings, Figul is a vertical, sectional View of a'clay-filled molding die embodying my invention, showingthe relation of the top and bottoni diemeinbers before being broughttogether to mold a back-k `-wall Fig tion of the die members when brought together; and p .y y

Fig. 3 is asimilar View showing the relation of the die members after the molding .operationv is completed Aand `the 1 main porl tion of the-top meinbergwithdrawn.

The toppdieV member, indicated generally at 1 0,"may be secured tothe topdplate llof ay ress in the usual manner,;as by'screws 12,

eing spaced therefrom by means rof spacer-y 40 bars 13. 'The lower mold structurefindi4- cated generally at 14, includes a bottom plate 15 which may rest on and be secured to the lower platen of the press, .a vertical enclosure or case 16 and a bottom die membe1 ork pla-telf?v for molding the lower' face of the clay piece. 4Said bttomfmember 17l is vertically slidable withinthe case 16, in theusual manner, for'ej ecting the moldedpiece, and is attached to an ejector rod 18 passing through 59 an aperture in plate 15.

tion'19 andrigidlybut detachably retained 'molding pressure, upon the surface of,k the' ..2 is yasimilarl viewk showing the posi-k upper diey member, Vleaving the removable rportion 20 in place onk the molded. .p1ece 26.

1929.'. serial Np. 380,877.

The npper die member portion. 19. which remains permanently aittached tothe top ,press platen 11by means of v the screws .12, f2 and a removabler embossing y portion 20 fitted within a recess 21 in said porin saidrecess 'by' means ofa verticalpin or stem 22 on theportion'20 passing y.throughfa hole 23 in portion 19 andprovidedwith a' wedge key 24 .whiehoccupies a transverseslot 251,11 the pin andrestsagainst the upper side I .Y of-mainportion 19. 'v

'The under surfaceofthe tion-2O hassuch a'contour asV will formthe de- Y sivred ornamental design Aor picture yon theexg5 v tremeupper corner orshoulderof'the work, which AI nayrinclude upwardly and laterally facing embossed portionsmore orlessundercut in-re'lation to the vertical tdirection of molded-piece, whichlin a back w'all'forradiantv gasheater is'usually formed ony a forwardly projectinghood or visor. VSaid removable portion 2O may be in yone orl morepiecesfa two-piece construction, vertically divided. in theniiddle, beingemployed rwhen ythe design igextendedtothe sides'orends of the molded f y I P1603 f .--wp La ,la vThe molding Ycv perationris performed by filling the case 16 of the lower dielstructure, over the bottom die plate 17, 'with'loose ..plas` tic. lclay 26 as V.indicated in Fig.Y 1, while the `'upper parts in ytheir assembledjcondition are retracted, andthe-n Qr'eratingihe Press, inthe usual manriertoimove the: Pref dlmember 1Q down intothe case 16 and compress the clay to impart the desired form to the molded .piece 26a by squeezing it under heavy pressure between the upper/and lower plates. ,and against thev lateral jmolding surfaces of said plates and ofthe case, as indicated in vFig. While diemember 10 is inv its lowest-posi? vtion, the key 24 is withdrawn and the press is operated to retract the main portion '19.,of the @S Shown in p `The ejector rod 18'is "thenV raised to elevate the lower die plat'e 17, with "the workthereon, into thev upperpart of'ca'se 16'. `The`"removable dieportionl 20 may then be stripped Vfrom the face of the Work, with# out disturbing' the embossed design which it has formed thereon, by pulling it ot in an upward slanting direction, transversely of .f the direction of the molding pressure.

My invention thus provides for rapidly(` molding in one operation, clay pieces having more or less undercut designs embossed thereon', thus eliminating the usual additional f steps formerly required to complete the desired designs by hand. A Wide variety of shapes and ornamental designs may be produced and the described details of construction may be variously modified Without de- Parting from the scope of the invention as 'defined in the claims.. Y Y

I claim:` f Y li'A clay-pressing die comprising members movable toward each other to mold the plasticV material between them, one of said members having a' removable portion adapt-v ed to beleft on the molded piece when the ref mainder'of sa-id member is retracted, and detachable from said piece transverselyv of the direction ofmolding pressure.

2; A claylpressing 'diecomp'rising top and Ybottom die plates, the top plate inoludinga .main portion and: a removable embossing por-k tion'rigidlyv supported thereon for molding an undercut lateral Vface on the Work, and "detachable fastening means connecting said portions and permitting the main portion to be Withdravvnjwhile the removable Aportion vstays on 'the Work until "separated therefrom independently of'said inain'portion.A Y

' 3. A claylpressing die comprising molding means for orminglthe top and bottom -aces of the Work, said means includingv a member having undercut` portions for molding an eX- ternal corner orshoulder which includes a lateral embossed faeeof vthe Work, and an adjacent molding portion movable with relation torsaid member and adapted to be Withy drawn from thework togvreleasesaid member ying case, molding means therein withdraw# dravvableilaterally.from the work,atop"mold ving, device in the case, Withdra,Wable'` up'- Yincludingiafstfem and key.

- and permit the latter to be independently separated'from the iivork. n l V 4. A .clay-pressing die comprising a moldable perpendicular-ly, 'and an'embossing memberI Withdravvable laterally from'` the Work.

fAolaypressing diegcomprising a ease and bottom molding plateadapted to befsupported on the loW-r platenrof aY press, atop Y shoulder-molding membrin thecase, Withwardly from said member and from the Work and having 'means for supporting" it from the upperpress platen,'and a detachable connection betweenfsaid fmember and device In Witnesswhereof I have hereunto set hand this 22nd Vday of `July, 1929.' i ANDREW P. KELLER; 

